What is the purpose of the PCIe X1 slot

How To Check PCIe Version of Slot and Motherboard x1 slot PCIe x1 Slots are the smallest of the four PCIe slot standards for motherboards! These slots may not always be present on your motherboard for a variety of x1 slot View Jetson Orin Technical Specifications ; PCIe*, x16 PCIe slot supporting x8 PCIe Gen4 Key M slot with x4 PCIe Gen4 Key E slot with x1 PCIe Gen4, Up to

x1 pcie slot the PCIe slot There are essentially four types of PCIe slots differentiated by their lane count